Steerable front wheel of motor-driven vehicles.



P. DAIMLER. STBBBABLE FRONT WHEEL oF MOTOR DRIVBN VEHICLES.

APPLIUATION FILED 00T. 25, 1906.

Patented Ja11.3, 1911.

UNITED sTATEs PATENT oEEICE.I

PAUL DAIMLER, OF UNTERTRKHEIM, GERMANY.

To all whom it may concern.:

Be it known that I, PAULDAIMLER, citizen of the Empire of Germany, residing at Untertrkheim, in the Kingdom of Wrtem= .5l

rber Germany, have invented certain new an useful Improvements in Steerable Front l Wheels of Motor-Driven Vehicles, of which '.-the following is a specification, reference being had 'therein to the accompanying drawing. v

This invention relates to va new kind of driving gear for steerable' front wheels' with 1 `which known means are partly used. and whereby the ysteerin ofthe wheels 1s greatly simplified and at t e same time the speed may be varied within a wide limit.

According to my invention I attain the said 'object by combining the devicein itself known consisting of a wheel axle pivot situated in or near the symmetric plane of thel wheel with the device principally known consisting of a front wheel havino' internally a bevel wheel' driven by a bevel pinion .v on/the wheel axle pivot. y

According lto my `invention I so modifyi this rincipally .known method of drivin i' the ront wheels, that not only the beve pinion -which gears with the bevel wheel on the front wheel and is on a sleeve but also the bevel wheel in gear with the driving shaft is'loosely mounted upon the part of the wheel axle pivot below the wheel axle but above the bottom wheel axle pivot bearing. By the said device the wheel axle pivot and sleeve thereon are mounted -un` commonly rigid and secure owing to the moment of rot-ary reaction resulting from driving the front wheel from below the wheel axle acting lupon the latter, being reduced to the difference ofthe moment of reaction of the force of the ground and that of the tooth pressure while compared with those devices where the drivin wheel ,is situated above the wheel axle, t e amount of the moment of rotary reaction on the wheel axle equals the sum of the said two moments. By the combination of this moment of rotary reaction with the device described that is to say, the employment of the wheel axle Specication of Letters Patent.

Application led October 25, 1906. Serial No. 340,547.

pivot in or near the symmetric plane of the wheel, the steering is rendered uncommonly easy. Y

y Bycombining the described manner of driving with a wheel axle pivot employed 1n the vertical symmetric plane of the wheel, a further advanta e is obtained, namely, that the wheel willgnot be aiected by any force liable to bring the teeth of the driving wheel out of gear with those of the front wheel, while in 4cases where the wheel axle pivot 1s situated outside the symmetric plane of the wheel, the wheel has a tendency to turn around an axis outside that of the wheel axle pivot which must necessari] produce forces which bringA the two whee s out of gear.

The `Vemployment of the two toothed wheels below the wheel axle 'ves also a certain liberty in the choice of t e speed variations, as the tooth wheel in gear with the wheel on the front wheel can be raised' or lowered without having to alter the normal construction of the vehicle in any way.

.Annexed drawing re resents a vertical section of; a vehicle Whee provided with my improved driving device.

Tol each end of the tube n which incloses the front wheel shaft m are secured .two bearino's f, f, situated above each other 'and carried by the fork like sup ort g, g. In theseI bearings the vertica pivots a are non-slidably mo'unted and at 71, adapted to receive the, steering arm, the wheel axle b and the pivot a being formed in one art.

The evel wheel inside the wheel c projects from the hub inwardly so that the wheel axle pivot a is situated as usual in the lar est vertical diameter of the wheel c.

n thepart of the wheel axle pivot a below the wheel axle b and above the bottom bearing f is a sleeve le having two bevel wheels g, p of which is in ear with the bevel w eel fr on the driving s aft m and g with a wheel d arranged on the inner side of the wheel c.

I claim:

In a front wheel driving and steering Patented Jan. 3, 19111.(-

wheel axle gear, a driving sha-ft, a front wheel axle in alinemenrJ with the said driving shaft and having a vertical pivot, a sleeve loosely mounted on said wheel axle pivot below said wheel axle, t-Wo bevel wheels keyed on the said sleeve, a bevel wheel on the inside of the said front wheel in ear with the lower and a bevel wheel secure upon the said driving shaft 1n gear with the upper of the said sleeve wheels, all combined substantially as 10 and for the purpose set forth.

In'testimony whereof I hereunto aix my signature in presence of two witnesses.

ROBERT UHLAND, ERNST ENTENMANN., 

